基于真有效值转换的宽频带电参数测试仪的设计

随着电力系统的不断发展,特别是整流器、逆变器等非线性负荷的大量使用,系统运行出现了各种各样的问题,如电压、电流波形严重畸变、高次谐波的出现,但是传统电参数测量仪器大多是针对工频50Hz而设计的,使用已有的测量仪器已经不能准确测量现在的电参数,文章研究分析了各种交流电参数的测量方法,设计了文中提出的基于真有效值转换的电参数测试仪系统。该系统对50Hz-20kHz的宽频带输入信号有较高准确度。

With the continuous development of power system,especially the extensive use of nonlinear loads such as rectifier and inverter,there are a variety of problems in the operation of the system,such as serious distortion of voltage and current waveforms,and the emergence of high-order harmonics.However,most of the traditional electrical parameter measuring instruments are designed for power frequency 50Hz,and the existing measuring instruments cannot accurately measure the current electrical parameters.In this paper,various measurement methods of alternating current parameters are studied and analyzed.The electrical parameter tester system based on true RMS conversion is designed in this paper.The system has high accuracy for the broadband input signal of 50Hz-20kHz.